package com.ruoyi.djb.interceptor;

import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTVerifier;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.exceptions.JWTDecodeException;
import com.auth0.jwt.exceptions.JWTVerificationException;
import com.ruoyi.common.annotation.AdminLoginToken;
import com.ruoyi.common.annotation.PassToken;
import com.ruoyi.common.annotation.UserLoginToken;
import com.ruoyi.common.utils.DateUtils;
import com.ruoyi.djb.domain.DjbAdmin;
import com.ruoyi.djb.domain.DjbUser;
import com.ruoyi.djb.mapper.DjbAdminMapper;
import com.ruoyi.djb.mapper.DjbUserMapper;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.Map;

import static com.ruoyi.djb.config.Constants.SYS_STATUS_DELETE;
import static com.ruoyi.djb.config.Constants.SYS_STATUS_DISSOLUTION;


/**
 * @author jinbin
 * @date 2018-07-08 20:41
 */
public class AuthenticationInterceptor implements HandlerInterceptor {
    @Resource
    DjbUserMapper userMapper;
    @Resource
    DjbAdminMapper adminMapper;

    private final String AlgorithmValue="jsdfsdfDFDfsd2343dfFDF";

    @Override
    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object object) throws Exception {
        String token = httpServletRequest.getHeader("token");// 从 http 请求头中取出 token
        String requestURI = httpServletRequest.getRequestURI();
        System.out.println(DateUtils.getTime()+"uri"+requestURI);
        Map<String, String[]> maps =  httpServletRequest.getParameterMap();
        for (Map.Entry<String, String[]> entry : maps.entrySet()) {
            String cs = "参数"+entry.getKey() + ":"+ Arrays.toString(entry.getValue())+";";
            System.out.println(cs);
        }
        // 如果不是映射到方法直接通过
        if(!(object instanceof HandlerMethod)){
            return true;
        }
        HandlerMethod handlerMethod=(HandlerMethod)object;
        Method method=handlerMethod.getMethod();
        //检查是否有passtoken注释，有则跳过认证
        if (method.isAnnotationPresent(PassToken.class)) {
            PassToken passToken = method.getAnnotation(PassToken.class);
            if (passToken.required()) {
                return true;
            }
        }
        //检查有没有需要用户权限的注解
        if (method.isAnnotationPresent(UserLoginToken.class)||method.isAnnotationPresent(AdminLoginToken.class)) {
            // 执行认证
            if (token == null) {
                throw new RuntimeException("登录已过期，请重新登录");
            }
            // 验证 token
            JWTVerifier jwtVerifier = JWT.require(Algorithm.HMAC256(AlgorithmValue)).build();
            try {
                jwtVerifier.verify(token);
            } catch (JWTVerificationException e) {
                throw new RuntimeException("您的登录状态已过期，请重新登录");
            }
            // 获取 token 中的 user id
            String userId;
            try {
                userId = JWT.decode(token).getClaim("id").asString();
            } catch (JWTDecodeException j) {
                throw new RuntimeException("401");
            }
            if(method.isAnnotationPresent(UserLoginToken.class)){
                DjbUser djbUser = userMapper.selectDjbUserById(Integer.valueOf(userId));
                if (djbUser == null) {
                    throw new RuntimeException("用户不存在，请重新登录");
                }
                /*检查当前TOKEN和库里的token是否一致，不一致则说明*/
                if (!djbUser.getToken().isEmpty() && !djbUser.getToken().equals(token)) {
                    throw new RuntimeException("您的登录已过期,请重新登录!");
                }
                httpServletRequest.setAttribute("user", djbUser);
            }else{
                DjbAdmin djbAdmin = adminMapper.selectDjbAdminById(Integer.valueOf(userId));
                if (djbAdmin == null) {
                    throw new RuntimeException("用户不存在，请重新登录");
                }
                /*检查当前TOKEN和库里的token是否一致，不一致则说明*/
                if (!djbAdmin.getToken().isEmpty() && !djbAdmin.getToken().equals(token)) {
                    throw new RuntimeException("您的登录已过期,请重新登录!");
                }
                /*检查小区是否被解散*/
                if (djbAdmin.getRemark().contains(SYS_STATUS_DELETE)) {
                    String remark = djbAdmin.getRemark();
                    djbAdmin.setRemark("");
                    adminMapper.updateDjbAdmin(djbAdmin);
                    throw new RuntimeException(remark);
                }
                /*检查员工是否被删除*/
                if (djbAdmin.getRemark().contains(SYS_STATUS_DISSOLUTION)) {
                    String remark = djbAdmin.getRemark();
                    djbAdmin.setRemark("");
                    adminMapper.updateDjbAdmin(djbAdmin);
                    throw new RuntimeException(remark);
                }
                httpServletRequest.setAttribute("admin", djbAdmin);
            }
            return true;
        }
        return true;
    }
    @Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception { }
    @Override
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception { }
}
